87666889988047 has 8 divisors (see below), whose sum is σ = 88138522063872. Its totient is φ = 87195389611800.

The previous prime is 87666889988021. The next prime is 87666889988089. The reversal of 87666889988047 is 74088998866678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87666889988047 - 2²³ = 87666881599439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87666889988017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31589853 + ... + 34252774.

It is an arithmetic number, because the mean of its divisors is an integer number (11017315257984).

Almost surely, 2^{87666889988047} is an apocalyptic number.

87666889988047 is a deficient number, since it is larger than the sum of its proper divisors (471632075825).

87666889988047 is a wasteful number, since it uses less digits than its factorization.

87666889988047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65849789.

The product of its (nonzero) digits is 112368549888, while the sum is 94.

The spelling of 87666889988047 in words is "eighty-seven trillion, six hundred sixty-six billion, eight hundred eighty-nine million, nine hundred eighty-eight thousand, forty-seven".